package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1= new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);

        Collection c2= new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);

        c1.addAll(c2);//将c2整个加到c1中
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3= new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3:"+c3);

        boolean contains=c1.containsAll(c3);
        System.out.println(contains);
/*
        //取交集：c1中仅保留与c3共有的元素，c3不变
        c1.retainAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);

 */
        //删交集：将c1中与c3相同的元素删除，c3不变
        c1.removeAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);

        //遍历集合方式：迭代器模式iterator()方法

    }
}
